installed the 450R carb and WOW.....!!!

what A nice enhancement..... :D The throddle responsose is gonna be VERY impressive!! :blah: Im not sure what all the hype was about having to make modifications, but we were still able to keep the choke AND the Hot start can be nicely tucked away:)
I was a little on the fat side with my old Carb,Im now lean, ditched the Air box, I think I may have to change my gearing in fears I may wheelie over :o :p It sounds soooooo much betterthan my stock Carb, I now know that my stocker was trashed for some time now after hearing how this sounds... I cant wait to try it at the track!!!:macho Anyone that can get there hands on one............. DO IT!! ;)

How was fit and finish?? What did you have to do to get it to work.

Did I read it correctly that you DITCHED the airbox?? Meaning the filter is bolted directly to the carb??


Some say the 450R shocks are a must to put on a 400ex, even though the stroke is wrong, grinding has to be done, etc, etc.

Yes let us know about this. I am with Rico, I would be running the airbox for sure, so how did that mount up?

That's good news QuadJunkies!!! I just got mine in yesterday, but I'm still waiting for the 450R cable from servicehonda. I have a few questions:

1- What pilot/main jets did you use in the 450R carb and what did you have on your old one(for reference).

2- Did you use the 400EX fuel hose, or did you use the 450R's?

3- Did you have to modify the choke so it would clear the fuel petcock?

I used the stock pilot jet and a 185 main jet, 4th notch on the needle, air/fuel screw 3 1/2 turns out. On the stock carb I ran the same set-up except for less turns on the air/fuel screw.
I used the fuel hose from the 450R.
The yellow plastic choke handle will not clear the petcock. My quad starts easily by just pumping the throttle 2 times before pushing the starter.
The hot start is not really needed, although I use it at times.

The carb works great on my track.

would you like some pics and Ill sit down with Troy and give more details tonight on it if you like ? :)

Yes, I thought Troy said he had to ditch the airbox, but Ill dbl. check on that;)
Fit and finish was VERY simple,its on good and tight,I still have the choke evenand the hot start is going to just be ziptied out of site.... now its all about just getting the jetting and pilot dialed in.... :ermm:

Quote:

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Originally posted by yfz450admirer
I used the stock pilot jet and a 185 main jet, 4th notch on the needle, air/fuel screw 3 1/2 turns out. On the stock carb I ran the same set-up except for less turns on the air/fuel screw.
I used the fuel hose from the 450R.
The yellow plastic choke handle will not clear the petcock. My quad starts easily by just pumping the throttle 2 times before pushing the starter.
The hot start is not really needed, although I use it at times.

The carb works great on my track.

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did you completley remove your choke or just cut the tab dowbn a bit?? Thts what he done to mine :) Als, what Elev. and temps are you at right now??? Im at 2800 and its Averaging this wk in the 40's, we race in the 20's

I want to see some pictures. Sounds like a good mod that I might have to look into....:)

Quote:

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Originally posted by khen
That's good news QuadJunkies!!! I just got mine in yesterday, but I'm still waiting for the 450R cable from servicehonda. I have a few questions:

1- What pilot/main jets did you use in the 450R carb and what did you have on your old one(for reference).

2- Did you use the 400EX fuel hose, or did you use the 450R's?

3- Did you have to modify the choke so it would clear the fuel petcock?

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Ill get more info tonight ;)

Thanks QuadJunkies and yfz450admirer! I'm looking forward to trying this out, hopefully the cable comes in today.. I didn't think to order a 450R fuel hose though :ermm: Hopefully I can make do without.